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MAX1776

24V, 600mA Internal Switch, 100% Duty Cycle, Step-Down Converter

Please check latest availability status for a specific part variant.

Overview

Description

The MAX1776 high-efficiency step-down converter provides an adjustable output voltage from 1.25V to V_IN from supply voltages as high as 24V. An internal current-limited 0.4Ω MOSFET delivers load currents up to 600mA. Operation to 100% duty cycle minimizes dropout voltage (240mV at 600mA).

The MAX1776 has a low 15µA quiescent current to improve light-load efficiency and conserve battery life. The device draws only 3µA while in shutdown.

High switching frequencies (up to 200kHz) allow the use of tiny surface-mount inductors and output capacitors. The MAX1776 is available in an 8-pin µMAX package, which uses half the space of an 8-pin SO. For increased output drive capability, use the MAX1626/ MAX1627 step-down controllers, which drive an external P-channel MOSFET to deliver up to 20W.

MAX1776: Typical Operating Circuit

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Key Features

Fixed 5V or Adjustable Output
4.5V to 24V Input Voltage Range
Up to 600mA Output Current
Internal 0.4Ω P-Channel MOSFET
Efficiency Over 95%
15µA Quiescent Supply Current
3µA Shutdown Current
100% Maximum Duty Cycle for Low Dropout
Current-Limited Architecture
Thermal Shutdown
Small 8-µMAX Package

Applications/Uses

Distributed Power Systems
Handheld Devices
Keep-Alive Supplies
Notebook Computers

Parametric Specs

Part Number

V_IN
(V)

V_OUT1
(V)

Preset V_OUT
(V)

Output Adjust. Method

I_OUT1
(A)

Switch Type

DC-DC Outputs

Oper. Freq.
(kHz)

Package/Pins

Budgetary
Price

min

max

min

max

See Notes

MAX1776

4.5

1.25

Preset

Resistor

0.6

Internal

200

UMAX/8

$3.93 @1k

See All Step-Down Switching Regulators (367)

Pricing Notes:

This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Design Resources

MAX1776EVKIT: Evaluation Kit for the MAX1776

Quality And Environmental

Device	Fab Process	Technology	Sample size	Rejects	FIT at 25°C	FIT at 55°C

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

Quality Management System >
Environmental Management System >

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Technical Docs

Type	ID	Title
Tutorial	5133	Power-Supply Solutions for Altera FPGAs
Tutorial	5132	Power-Supply Solutions for Xilinx FPGAs
App Note	225	Using Digital Potentiometers in Adjustable Step-Down DC-DC Converter Designs